Shedding mechanism for looms.



A. A. GORDON, JR. SHEDDIN G MEOHANISM'FOB LOOMS. APPLICATION FILED FEB-24, 1909.

Patented Aug.'9, 1910.

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A. A. GORDON, JR. 7 SHEDDING MECHANISM FOR LOOMS APPLICATION FILED FEB.24 I909. 966,439.

Paten ted Aug. 9, 1910.

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ALBERT A. GORDON, JR., 0F WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON& KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

SHEDDING MECHANISM FOR LOOMS.

Specification of Letters Patent.

Patented Aug. 9, 1910.

Application filed. February 24, 1909. Serial No. 479,763.

To all whom it may concern:

Be it known that I, ALBERT A. GORDON, Jr., a citizen of the UnitedStates, residing at Worcester, in the county of Worcester and State ofMassachusetts, have invented certain new and useful Improvements inShedding Mechanism for Looms, of which the following is a specification.

My invent-ion relates to shedding mech anism for looms, and moreparticularly to an auxiliary mechanism for weaving names, trade marks,or designs on the border, or some other portion of the woven fabric, andto be used on looms in connection with the ordinary shedding mechanism.

The object of my invention is to provide a mechanism of the classreferred to, of improved construction, which may be used on a loom, asan auxiliary shedding mechanism, and which is preferably located at theopposite end of the loom from the harness operating mechanism, andadapted to operate a certain number of warp threads on the border orsome other part of the fabric, to weave names, trade marks, or otherdesigns into the fabric, according to a pattern indicating card,preferably made of some flexible material.

My auxiliary shedding mechanism has the pattern cylinder or drum,carrying the pattern surfaces, preferably located directly below thedobby fingers of a dobby, and a single connection from some driven partof the loom, through an intermediate connection to the lifter bars forthe dobby hooks, and through an intermediate connection to the patterncylinder or drum, operates the lifter bars, and also the patterncylinder or drum, to raise and lower said cylinder and carry the patternsurfaces thereon into and out of engagement with the dobby fingers.

My invention consists in certain novel features of construction of myimprovements as will be hereinafter fully described.

I have only shown in the drawings my improved mechanism, detached, withsufficient parts of a loom combined therewith to enable those skilled inthe art to understand the construction and operation thereof.

Referring to the drawings :-Figure 1 is a rear View of a dobby, with myimprovements applied thereto, looking in the direction of arrow a, Fig.4. Fig. 2 shows some of the parts shown in Fig. l, detached, and in adifferent position. Fig. 3 shows the opposite side view of the partsshown in Fig. 1, looking in the direction of arrow 5, Fig. 4; some ofthe parts shown in Fig. 1 are not shown in this figure, and some partsare shown broken away, and in section, and, Fig. 4 is an outside endview of the parts shown in Fig. 3, looking in the direction of arrow 0,same figure; some parts broken away and shown in section in Fig. 3, areshown in full in this figure.

In the accompanying drawings, 1 is a portion of a loom arch, havingsecured thereon brackets 2, and 3, on which is fastened the frame 4 ofthe dobby; only one frame 4 is used in this instance, on which aresupported the several parts of the dobby mechanism.

The harness operating mechanism consists in this instance of the jacks5, pivotally supported at their lower ends on a rod 6, see Fig. 3. Thejacks 5 for the harnesses, in this instance nine in number, have theirupper ends provided with harness cords 7, which pass through a guideplate 8, and downwardly through a small comber board 9, suitably locatedover the place where the border or edge is to be woven on the fabric. Onthe forwardly extending projection 5 on a jack 5, see Fig. 3, iscentrally pivoted the hook lever 10, and to the upper and lower ends ofeach hook lever 10 is pivotally attached the end of a hook 11, and 11,respectively, in the ordinary way.

The upper hooks 11 are raised through wires 12, operated by the dobbyfingers 18, and the lower hooks 11 are raised by the dobby fingers 13,to disengage their hook ends from the upper and lower lifter bars 14,and 14, respectively.

The hubs 13 of the dobby fingers 13 are pivotally mounted on a rod 24,and said fingers extend inwardly from said rod and have their pivotsupport located on the 0pposite side of the pattern cylinder or drumfrom the pivot support of the jacks 5.

The lifter bars 14 and 14 form a frame, with its arms 14 extending outfrom the hubs 14, which are loosely mounted on the shaft or rod 15, seeFig. 1. The inner hub 14, on the lifter bars 14: and 1 1, has the part16 extending out therefrom and back to the outer hub 16 on a lever 16,see Figs. 1 and 2. A stud 17 on the lever 16 has pivotally connectedthereto the upper end of a downwardly extending rod or connector 18,through which a rocking motion is communicated to the lever 16 from somedriven part of the loom, preferably from the bottom shaft, not shown. 4

The outer end of the lever 16 is provided with a roll 19, which isadapted to engage and operate a cam lever 20, through the roll 19traveling on the curved or cam-shaped edge of said lever, to communicatea rocking motion to said lever 20, which is pivotally mounted on a stud20 on the frame. The lever 20 has a downwardly extending arm 20, the endof which is pivotally connected with one end of a link 21; the otherend. of said link 21 is pivotally connected with a stud 22 on an arm 23,which has its hub 23 pivotally mounted on a rod 2 1 on the frame 4. Asecond arm 25, 011 the inner side of the machine, see Figs. 3 and 1, hasits hub 25 loosely mounted on the rod 24. The downwardly extending endsof each arm 23, and 25 have a bearing 23 and 25 thereon, respectively,for a shaft 26, on which are mounted in this instance the sheaves ordisks 27, and 27 of the pattern cylinder or drum, and also in thisinstance the srupporting disks 27 over which the pattern surface 28passes. The pattern surface 28 is in this instance, an endless band orbelt, of some suitable flexible material, as fiber, with holes punchedtherein, according to what is to be woven on the fabric. The patternband operates the dobby fingers 13, raising them when the band isimperforated, and allowing them to drop .when a perforation or hole ispresented.

In using an endless band, for a pattern surface, the holes for the dobbyfingers can be made very close together, and consequently a shorter andmuch lighter pattern surface is obtained over the ordinary metal patternchain, or dobby chain, made up of wood bars, linked together. Theendless band 28 passes over a series of pulleys or guide sheaves,suitably supported, as 28 28, 28 and. 28 and then over the upper side ofthe pattern cylinder or drum, and under the dobby fingers. Holes in theedges of the band 28 receive the pins on the disks 27 and 27, and causethe movement of said band as said disks revolve.

A tension roll 28 is mounted on the outer end of an arm 25', extendingout from the bearing 25" on the arm 25, see Fig. 3, and the band 28passes under said roll 28, and as said roll 28 is moved with the arm 25"and the arm 25, it acts to maintain a uniform tension on the band 28.

The outer disk 27 is in this instance provided with a ratchet gear 29,and is adapted to be engaged by, and operated every up and down movementof the cylinder, by a pull pawl 30, see Figs. 1, and 2, which has itshub loosely mounted on the stud 20, to revolve the ratchet one tooth forevery pick.

A spring actuated pin or plunger 31 is held in a boss 23 on the arm 23,see Fig. 3, and adapted to engage the teeth on the ratchet wheel 29 andlock or hold the pattern cylinder or drum after each partial rotationthereof.

From the above description in connection with the drawings the operationof my improvements will be readily understood by those skilled in theart, and briefly is as follows :Through the vertical up and downmovement of the single rod or connector 18, operated from some movingpart of the loom, an up and down movement is communicated to the lever16, as shown by full and broken lines in Fig. 2, and movement iscommunicated to the lifter bars 1 1, and 14., at regular predeterminedintervals, to cause them to move the hooks 11, and 11, mounted on thehook levers 10, which in turn are mounted on the jacks 5, to move saidjacks and the harness cords 7 connected therewith, in the same manner asin the ordinary dobby. The up and down movement of the arm 16 alsocauses the roll 19 thereon to travel on the cam lever 20, to rock saidlever, and through the arm 20 and link 21, to raise and lower thepattern cylinder or drum, as shown in Figs. 1, and 3, to cause thepattern surface, or pattern card band 28 thereon, to operate the dobbyfingers 13, and the hooks 11, and the engagement of the hook 30 with theratchet wheel 29 on the pattern cylinder or drum, will cause therevolution of said drum, all as will be fully understood by thoseskilled in the art.

It will be understood that the details of construction of myimprovements may be varied if desired, an ordinary dobby pattern chain,composed of wood bars linked together, and carrying pattern pins, may beused in place of the endless pattern band 28, if preferred.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is In a loom, an auxiliary shedding mechanismto operate warp threads, to weave names, etc., in the fabric, andcomprising jack levers, hook levers, and hooks, lifter bars foroperating said hooks, dobby fingers for said hooks, a rotatable patterncylinder or drum, a pattern surface, and means for moving the lifterbars, and for raising and lowering said pattern cylinder or drum, saidmeans comprising a single connection from a driven part of the loom, anda lever connected With the lifter bars, and carrying a roll, and apivotally mounted cam lever engaged by said roll, and connections fromsaid cam lever to the frame carrying the pattern cylinder or drum, and apawl pivotally mounted on a stud on the frame to engage 1 ratchet teethon the pattern cylinder or drum to rotate said drum.

ALBERT A. GORDON, JR. Witnesses:

M. HAAS, J. C. DEWEY.

